CN106195804A - 平面光源的l型光学结构及具有该结构的平面光源 - Google Patents

平面光源的l型光学结构及具有该结构的平面光源 Download PDF

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CN106195804A
CN106195804A CN201610814316.3A CN201610814316A CN106195804A CN 106195804 A CN106195804 A CN 106195804A CN 201610814316 A CN201610814316 A CN 201610814316A CN 106195804 A CN106195804 A CN 106195804A
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guide plate
light guide
site
light source
type optical
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盛玉林
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KUNSHAN CHENGTAI ELECTRICAL CO Ltd
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KUNSHAN CHENGTAI ELECTRICAL CO Ltd
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Priority to CN201610814316.3A priority Critical patent/CN106195804A/zh
Publication of CN106195804A publication Critical patent/CN106195804A/zh
Priority to PCT/CN2017/089184 priority patent/WO2018040681A1/zh
Priority to CN201780002956.7A priority patent/CN108291696A/zh
Priority to EP17844987.2A priority patent/EP3358247B1/en
Priority to US15/941,007 priority patent/US10274669B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0093—Means for protecting the light guide
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V15/00—Protecting lighting devices from damage
    • F21V15/04—Resilient mountings, e.g. shock absorbers 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • G—PHYSICS
    • G02—OPTICS
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    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source in the package
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
    • F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
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    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
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    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0051—Diffusing sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
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    • G02B6/0085—Means for removing heat created by the light source from the package

Abstract

本发明公开了一种平面光源的L型光学结构以及具有该L型光学结构的平面光源，包括导光板和位于导光板侧面处的两条LED灯条，导光板为方片状，所述导光板具有相对的背面和出光面以及位于背面和出光面之间的四个侧面，所述导光板的背面具有多个导光网点，两条所述LED灯条分别设置于所述导光板的一对相邻的侧面处，所述导光板的另一对相邻侧面处设置有缓冲材料，还包括反射层和外框，所述反射层位于所述导光板的背面侧。本发明提供一种L型光学结构和具有该L型光学结构的平面光源，能够以缓冲材料的弹性形变来吸收导光板的受热膨胀变形，从而避免导光板挤压LED灯珠，杜绝因导光板受热膨胀变形而导致的LED灯珠损坏，可以有效提升LED平面光源的使用寿命。

Description

平面光源的L型光学结构及具有该结构的平面光源
技术领域
本发明LED平面灯领域，具体涉及一种用于平面灯、灯箱或显示器背板等平面光源的新光学结构。
背景技术
LED平面灯是一款高档的室内照明灯具，其外边框一般由铝合金制成，利于散热，光源为LED，整个灯具设计美观简洁、大气豪华，既有良好的照明效果，又能给人带来美的感受。LED平面灯设计独特，光经过高透光率的导光板后形成一种均匀的平面发光效果，照度均匀性好、光线柔和、舒适而不失明亮，可有效缓解眼疲劳。LED平面灯无辐射，不会刺激孕妇、老人、儿童的皮肤。LED平面灯还具有超薄、结构精简、易于集成于吊顶、不易损坏以及不会藏污纳垢等优点。基于上述优点，LED平面灯的应用越来越广泛。然而，现有的LED平面灯常常由于LED灯珠的损坏而降低正常使用寿命，究其主要原因是，如图1所示，在现有技术中，LED平面灯中的装载有若干个LED灯珠的LED灯条A有两条并且相对布置于导光板B相对的两侧，在打开LED平面灯后，LED灯珠发光的同时产生热量，导光板在受热后会向四周膨胀，从而会挤压到两侧LED灯条上的LED灯珠，造成LED灯珠的不良损坏，缩短整个LED平面灯的使用寿命。
发明内容
为解决上述技术问题，本发明提供一种L型光学结构和具有该L型光学结构的平面光源，能够以缓冲材料的弹性形变来吸收导光板的受热膨胀变形，从而避免导光板挤压LED灯珠，杜绝因导光板受热膨胀变形而导致的LED灯珠损坏，可以有效提升LED平面光源的使用寿命。
本发明为了解决其技术问题所采用的技术方案是：
一种平面光源的L型光学结构，包括导光板和位于导光板侧面处的两条LED灯条，所述导光板为方片状，所述导光板具有相对的背面和出光面以及四个侧面，所述导光板的背面具有多个导光网点，两条所述LED灯条分别设置于所述导光板的一对相邻的侧面处，所述导光板的另一对相邻侧面处设置有缓冲材料。
进一步地说，所述导光网点的排布结构是以所述一对相邻的侧面的交点为起始点并且沿着导光板的背面逐渐增加导光网点的单位覆盖面积。
进一步地说，所述缓冲材料是沿着导光板的侧面连续分布的条形的缓冲材料条或是沿着导光板的侧面间断分布的点状的缓冲材料块。
进一步地说，所述导光网点的排布结构为以下三种排布结构中的一种：
一、所述导光网点的间距相同且导光网点的尺寸逐渐增大；
二、所述导光网点的间距逐渐增大且导光网点的尺寸相同；
三、所述导光网点的间距和尺寸皆逐渐增大。
进一步地说，所述导光网点为凸出网点或内凹网点。
进一步地说，所述导光网点是以下结构中的一种：
一、所述导光网点是由丝网印刷或涂布在导光板背面的扩散剂物质构成的凸出高度为0.01～0.2mm的凸出网点；
二、所述导光网点是由模具射出转印到导光板背面形成的凸出高度为0.001～0.03mm的凸出网点；
三、所述导光网点是通过热压方式在导光板背面形成的内凹深度为0.01～0.2mm的内凹网点；
四、所述导光网点是通过镭射加工在导光板背面形成的内凹深度为0.05～0.3mm的内凹网点。
较佳的是，所述缓冲材料为弹簧、EVA缓冲材料、EPS缓冲材料、EPP缓冲材料、EPE缓冲材料或EPO缓冲材料。
较佳的是，所述导光网点的形状为菱形、正五边形、正三角形、圆形、正六边形、椭圆形或正八边形。
一种具有L型光学结构的平面光源，包括所述L型光学结构，还包括反射层和外框，所述反射层位于所述导光板的背面侧，所述导光板和所述反射层于边缘处固定于所述外框，所述LED灯条位于所述外框与所述导光板之间，所述缓冲材料位于所述外框与所述导光板之间。
进一步地说，所述缓冲材料贴于所述导光板的侧面或外框的内侧面。
本发明的有益效果是：本发明的L型光学结构的中LED灯条设置在导光板的一对相邻的侧面，且另一对相邻侧面处设有缓冲材料，在导光板受热时，由于在设置有缓冲材料方向受到的阻力较设置有LED灯条方向小，使导光板整体向缓冲材料方向扩张，而缓冲材料也发生内凹或收缩的弹性形变来吸收导光板的受热膨胀变形，从而避免导光板挤压LED灯珠，杜绝因导光板受热膨胀变形而导致的LED灯珠损坏，可以有效提升LED平面光源的使用寿命；在导光板不受热时，导光板变冷回缩，缓冲材料也随之恢复原状；导光板上导光网点的排布结构，能使LED灯珠发出的光线通过导光板后均匀的发光；反射层将光线反射回导光板，提高光的使用效率。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，并可依照说明书的内容予以实施，以下以本发明的较佳实施例并配合附图详细说明如后。
附图说明
图1为现有技术的LED灯条和导光板的布置结构示意图；
图2为本发明的L型光学结构的示意图；
图3为本发明的导光网点的一种排布结构示意图(以圆形网点为例，导光网点间距相同且导光网点的尺寸逐渐增大)；
图4为本发明的一种LED平面灯的剖面结构示意图。
具体实施方式
以下通过特定的具体实例说明本发明的具体实施方式，本领域技术人员可由本说明书所揭示的内容轻易地了解本发明的优点及功效。本发明也可以其它不同的方式予以实施，即，在不背离本发明所揭示的范畴下，能予不同的修饰与改变。
实施例1：参见图2至图3，本发明的一种平面光源的L型光学结构，包括导光板2和位于导光板侧面处的两条LED灯条1，所述导光板2为方片状，所述导光板2具有相对的背面和出光面以及位于背面和出光面之间的四个侧面，所述导光板2的背面具有多个导光网点21，两条所述LED灯条1分别设置于所述导光板2的一对相邻的侧面处，所述导光板2的另一对相邻侧面处设置有缓冲材料3。
所述导光网点21的排布结构是以所述一对相邻的侧面的交点为起始点并且沿着导光板的背面逐渐增加导光网点的单位覆盖面积。
本实施例中，所述缓冲材料3是沿着导光板2的侧面连续分布的条形缓冲材料条。但在具体实施时，该缓冲材料3也可以是沿着导光板的侧面间断分布的点状的缓冲材料块。
在实际可行的方案中，所述导光网点21的排布结构可以是以下三种排布结构中的一种：
一、所述导光网点21的间距相同且导光网点的尺寸逐渐增大；
二、所述导光网点21的间距逐渐增大且导光网点的尺寸相同；
三、所述导光网点21的间距和尺寸皆逐渐增大。
如图3所示，本实施例中导光网点21采用第一种排布结构。
所述导光网点21为凸出网点或内凹网点，具体可以是以下结构中的一种：
一、所述导光网点21是由丝网印刷或涂布在导光板背面的扩散剂物质构成的凸出高度为0.01～0.2mm的凸出网点；
二、所述导光网点21是由模具射出转印到导光板背面形成的凸出高度为0.001～0.03mm的凸出网点；
三、所述导光网点21是通过热压方式在导光板背面形成的内凹深度为0.01～0.2mm的内凹网点；
四、所述导光网点21是通过镭射加工在导光板背面形成的内凹深度为0.05～0.3mm的内凹网点。
所述缓冲材料3为弹簧、EVA缓冲材料、EPS缓冲材料、EPP缓冲材料、EPE缓冲材料或EPO缓冲材料，但不限于此。
所述导光网点21的形状为菱形、正五边形、正三角形、圆形、正六边形、椭圆形或正八边形，但不限于此。
实施例2：参见图4，本发明还提供一种具有L型光学结构的平面光源，包括所述L型光学结构，还包括反射层4和外框5，所述反射层4位于所述导光板2的背面侧，所述导光板2和所述反射层4于边缘处固定于所述外框5，所述LED灯条1位于所述外框5与所述导光板2之间，所述缓冲材料3位于所述外框5与所述导光板2之间。
所述缓冲材料3贴于所述导光板2的侧面或外框5的内侧面。
本发明的平面光源还可进一步在导光板的出光面侧设置扩散层6，以进一步柔和光线以及扩大光线的照射范围；还可以更进一步的将扩散层与外框一体化；更可以在扩散层外设置有色层或是在扩散层内注入色母等物质，以使平面光源具有彩色光线；还可以在反射层外设置背板7，以保护整个光学结构并增加平面光源的牢固性以及便于安装。
本发明的平面光源可以是LED平面灯、灯箱或显示器背板。
本发明的工作原理：本发明的平面光源的L型光学结构的中LED灯条设置在导光板的一对相邻的侧面，且另一对相邻侧面处设有缓冲材料，在导光板受热时，由于在设置有缓冲材料方向受到的阻力较设置有LED灯条方向小，使导光板整体向缓冲材料方向扩张，而缓冲材料也发生内凹或收缩的弹性形变来吸收导光板的受热膨胀变形，从而避免导光板挤压LED灯珠，杜绝因导光板受热膨胀变形而导致的LED灯珠损坏，可以有效提升LED平面光源的使用寿命；在导光板不受热时，导光板变冷回缩，缓冲材料也随之恢复原状；导光板上导光网点的排布结构，能使LED灯珠发出的光线通过导光板后均匀的发光；反射层将光线反射回导光板，提高光的使用效率；扩散层进一步柔和光线以及扩大光线的照射范围；背板保护整个光学结构并增加平面光源的牢固性以及便于安装。
以上所述仅是本发明的优选实施方式，并不用于限制本发明，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本发明的保护范围。

Claims (10)

1.一种平面光源的L型光学结构，包括导光板和位于导光板侧面处的两条LED灯条，其特征在于：所述导光板为方片状，所述导光板具有相对的背面和出光面以及四个侧面，所述导光板的背面具有多个导光网点，两条所述LED灯条分别设置于所述导光板的一对相邻的侧面处，所述导光板的另一对相邻侧面处设置有缓冲材料。
2.如权利要求1所述的平面光源的L型光学结构，其特征在于：所述导光网点的排布结构是以所述一对相邻的侧面的交点为起始点并且沿着导光板的背面逐渐增加导光网点的单位覆盖面积。
3.如权利要求1所述的平面光源的L型光学结构，其特征在于：所述缓冲材料是沿着导光板的侧面连续分布的条形的缓冲材料条或是沿着导光板的侧面间断分布的点状的缓冲材料块。
4.如权利要求2所述的平面光源的L型光学结构，其特征在于：所述导光网点的排布结构为以下三种排布结构中的一种：
一、所述导光网点的间距相同且导光网点的尺寸逐渐增大；
二、所述导光网点的间距逐渐增大且导光网点的尺寸相同；
三、所述导光网点的间距和尺寸皆逐渐增大。
5.如权利要求1所述的平面光源的L型光学结构，其特征在于：所述导光网点为凸出网点或内凹网点。
6.如权利要求5所述的平面光源的L型光学结构，其特征在于：所述导光网点是以下结构中的一种：
一、所述导光网点是由丝网印刷或涂布在导光板背面的扩散剂物质构成的凸出高度为0.01～0.2mm的凸出网点；
二、所述导光网点是由模具射出转印到导光板背面形成的凸出高度为0.001～0.03mm的凸出网点；
三、所述导光网点是通过热压方式在导光板背面形成的内凹深度为0.01～0.2mm的内凹网点；
四、所述导光网点是通过镭射加工在导光板背面形成的内凹深度为0.05～0.3mm的内凹网点。
7.如权利要求1所述的平面光源的L型光学结构，其特征在于：所述缓冲材料为弹簧、EVA缓冲材料、EPS缓冲材料、EPP缓冲材料、EPE缓冲材料或EPO缓冲材料。
8.如权利要求1所述的平面光源的L型光学结构，其特征在于：所述导光网点的形状为菱形、正五边形、正三角形、圆形、正六边形、椭圆形或正八边形。
9.一种具有权利要求1所述的平面光源的L型光学结构的平面光源，其特征在于：包括所述L型光学结构，还包括反射层和外框，所述反射层位于所述导光板的背面侧，所述导光板和所述反射层于边缘处固定于所述外框，所述LED灯条位于所述外框与所述导光板之间，所述缓冲材料位于所述外框与所述导光板之间。
10.如权利要求9所述的平面光源，其特征在于：所述缓冲材料贴于所述导光板的侧面或外框的内侧面。
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Application publication date: 20161207